Considering I want something simple, fast and silent, how could I improve performance for my current rig? I am not gaming like I used to. I did Crysis2, OldRepublic (before stupid free-to-play we cut ur in-game money by 90% update), Tera (recently) and will be wanting to go towards Sim City 2013, StarCraft 2 (Heart of Swarm).

Should I wait to get a completely new rig in a couple of years?
Should I go GTX680 Direct CUII?
Should I change mobo?
Should I change anything else?
Should I stop making question that begins with "Should I"?